EP0853547B1 - FLACHBAND IM BESONDEREN ZUM VERSTäRKEN VON LEITUNGEN, VERFAHREN ZU DESSEN HERSTELLUNG UND LEITUNGEN DIE DURCH DAS FLACHBAND VERSTäRKT WERDEN - Google Patents

FLACHBAND IM BESONDEREN ZUM VERSTäRKEN VON LEITUNGEN, VERFAHREN ZU DESSEN HERSTELLUNG UND LEITUNGEN DIE DURCH DAS FLACHBAND VERSTäRKT WERDEN Download PDF

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Publication number
EP0853547B1
EP0853547B1 EP96931871A EP96931871A EP0853547B1 EP 0853547 B1 EP0853547 B1 EP 0853547B1 EP 96931871 A EP96931871 A EP 96931871A EP 96931871 A EP96931871 A EP 96931871A EP 0853547 B1 EP0853547 B1 EP 0853547B1
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EP
European Patent Office
Prior art keywords
ribbon
longitudinal
bundle
wicks
binding material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96931871A
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English (en)
French (fr)
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EP0853547A1 (de
Inventor
Jo[L Le Nouveau
Anh Tuan Do
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technip France SAS
Original Assignee
Coflexip SA
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Filing date
Publication date
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Publication of EP0853547A1 publication Critical patent/EP0853547A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • B29C70/226—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure comprising mainly parallel filaments interconnected by a small number of cross threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/542—Placing or positioning the reinforcement in a covering or packaging element before or during moulding, e.g. drawing in a sleeve
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/04—Rope bands
    • D07B5/045—Belts comprising additional filaments for laterally interconnected load bearing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/256—Sheets, plates, blanks or films
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • Y10T428/24091—Strand or strand-portions with additional layer[s]
    • Y10T428/24099—On each side of strands or strand-portions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • Y10T428/24091—Strand or strand-portions with additional layer[s]
    • Y10T428/24099—On each side of strands or strand-portions
    • Y10T428/24107—On each side of strands or strand-portions including mechanically interengaged strands, strand-portions or strand-like strips

Definitions

  • the present invention relates to a flat ribbon, in particular for reinforce pipes as well as pipes reinforced by such tapes.
  • An interesting application of the flat tape according to the invention is the production of the armor of a hose used in the petroleum industry.
  • each tape or tape being made up of filamentary wicks of synthetic or natural material, which are interconnected via either a binding material and regardless of the degree of impregnation of said wicks, or of textile threads woven, braided, ribboned or twisted.
  • the technique of the first category has the disadvantage of require a significant proportion of material to ensure the binding of wicks between them. We are currently witnessing a proportion of matter of around 50% by volume even when the fibers inside the wicks are only partially or not at all impregnated. This results in a limited performance in terms of maximum admissible resistance per unit of section. This particularly concerns the case of profiles made of material FRP (Fiber Reinforced Plastic) composite such as a fiber composite green or aramid fiber and thermosetting or thermoplastic resin also although the case of ribbons consisting of a layer of "rovings" (for example aramid example) parallel juxtaposed and contained in a mass of thermoplastic material such as polyamide, said mass being continuous longitudinally and transversely.
  • FRP Fiber Reinforced Plastic
  • the frame has spaced longitudinal wires forming a unidirectional structure and a flattened tubular braid forming a bidirectional structure which surrounds the longitudinal wires.
  • She also includes wires comprising hot melt material for tie the longitudinal threads like a loose woven weft. After heat treatment, the hot-melt material maintains the wires between them and their connection with the tubular braid.
  • the products described in the above patents are products reinforcing intermediates used in the composition of a complex laminate, for example tubes made of FRP composite material. They are put in works by being embedded in a thermosetting resin and constitute the reinforcing member after curing the resin. As such, they must present bare chain or braid threads to allow a good adhesion of the resin serving as a matrix to the laminated article.
  • the type of assembly is everything first penalized by a phenomenon of decline in the resistance of wicks.
  • the lapse expresses in percentage a loss of tenacity of the wicks when assembled relative to the toughness of the wick taken individually.
  • Lapse is a parameter that increases with the number of wicks to be assembled and which depends on the assembly technique used. It is equivalent to a loss of overall ribbon yield which can exceed 30 to 40% depending on the types of assembly. To this is added a loss additional yield when the ribbon is subjected to tension in being supported on a curved surface. In this case, the wicks are not solicited together at their maximum resistance (non-even tension). This loss can only be compensated with the addition of new wicks, resulting finance costs and an even worse return.
  • these wicks can be coated in the material, the degree of coating of the filaments constituting the wicks can vary depending on the applications.
  • the disadvantages set out above relate at least in part of elongated items such as strapping bands or tapes, straps, flat ropes, belts, conveyor belts, when the latter are subjected in particular to tensile stresses while resting around a curved surface.
  • a ribbon comprising a layer of longitudinal filament locks which are joined together with the others in the form of a bundle, means of restraint surrounding the layer of filament wicks and a binding material disposed at the interface of the restraining means and filamentary rovings.
  • the wires surrounding the bundle of longitudinal strands are weft threads; moreover, the compactness of the filament strands is such that the beam is unsuitable for application in a reinforcement flexible pipes covered by this application.
  • the object of the present invention is to provide a flat ribbon which has optimal resistance to tensile stresses in particular when wrapped around a curved surface.
  • Another object of the present invention is a flat ribbon
  • the ribbon is particularly efficient in terms of tensile strength especially when it is in support on a curved surface.
  • the bundle strands have improved stability. Ways restraint indeed oppose the spreading of the wicks in the direction of the width of the tape creating a dimensional blockage while the material of tying contributes to the stability of the whole.
  • binding material is disposed at least at the interface of the transverse elements and said beam; according to a preferred characteristic, and in a complementary manner or in alternative to the above characteristic, the bonding material extends through said bundle of filamentary rovings at least in the direction of its thickness ; the means of restraint are, in turn, produced in the form a sheath, or a series of individual loops or a series of turns based on said transverse elements.
  • the proportion of the binding material in the ribbon is not more than 40%. Thanks to that characteristic, an excellent compromise between tensile strength, stability of the locks and good flexibility is thus obtained, the flexibility allowing the ribbon to wrap around a curved surface.
  • the invention also relates to a method for manufacture a tape which is in accordance with the invention and which is also resistant to abrasion of the bundle strands between them.
  • This process has the particular advantage of facilitating the introduction of the binding material in the ribbon.
  • the invention also relates to a first application of the ribbon as armor tape for flexible conduits which allows create large diameter pipes optimized for mechanical strength.
  • the ribbon is possible to control harmful effects such as the rotation of flexible driving and abrasion of ribbons. It follows in particular that the permissible pressure in large diameter pipes is considerably increased.
  • tape according to the invention is its use in conveyor belts or as a tape strapping, strap, flat cord, straps or the like.
  • the ribbon comprises at least one layer of longitudinal filament rovings and assembly means of these wicks.
  • the assembly means comprise at least one material of binding impregnating the filament wicks at least in places as well as described below.
  • the ribbon 1 according to a first embodiment comprises a single layer 2 of longitudinal filament wicks 3 which are, in accordance with the invention, agglomerated with each other and which are kept in this agglomerated state, in the form of a flat bundle and in a substantially rectangular section, by restraining means 4, which are part of the means of assembling the wicks in the same way as the binding material.
  • wicks are understood to mean a set or group of continuous threads, twisted or not twisted together, each thread can be a monofilament or a set of fibers or filaments continuous or discontinuous, assembled in particular by twisting or spinning.
  • a group of twisted or untwisted continuous filaments is commonly called "roving”.
  • a wick can be obtained by assembling several elementary locks, for example by twisting or simply by a parallel grouping of several elementary locks.
  • each longitudinal drill bit is composed of continuous aramid filaments, grouped together by twisting.
  • the means of restraint are based on oblique or straight transverse elements, i.e. they have such elements so as to contain and clamp the wicks filamentary of the flat bundle in the compressed state, each filamentary wick with a determined average compactness of at least 60%. They mainly oppose the spreading effect of the locks in the direction of the width of the ribbon by creating a dimensional blocking.
  • the elements included in the means of contention can be continuous threads, monofilaments, wicks filamentary as defined above, traditional constituents of non-woven fabrics or by a mixture of monofilaments and wicks filamentary, the respective proportions being determined according to the applications of the tape and the mechanical properties it must have in such and such application.
  • the strands of the bundle have a longitudinal contact between them, that is to say they are joined longitudinally. That means that, preferably, the locks are not separated nor by elements at the sense of the invention such as intertwining of a weaving, or ultimately by a large amount of binding material. Indeed, the fact of interlacing the locks causes the bundle and tying material to collapse in large quantity reduces the overall compactness of the ribbon.
  • the wicks of the central bundle are free of element which intertwine them.
  • the restraining means consist of a tubular compression sheath 4, comprising transverse elements and inside which the wicks are arranged filamentary 3.
  • a binding material is arranged at least at the interface between the compression sheath 4 and the wicks filamentary 3, said binding material being for example a thermoplastic, so as to bond the sheath to the wicks by impregnating their surfaces respective.
  • the compression sheath 4 of FIG. 2 consists of a fabric tubular flattened type warp and weft.
  • Cross-cutting elements 7 substantially perpendicular to the longitudinal direction of the ribbon form the weft, while wicks 6 substantially parallel to the wicks 3 of the bundle 2 form the chain.
  • the frame 7 interlaces the chain 6 while surrounding the strands 3 of the bundle 2.
  • the frame and the chain consist of a filamentary wick, although each may consist of a thread or a continuous filament of equivalent strength.
  • the frame is spaced by a loose pitch greater than 5 times its diameter. Good results have been found for a step of approximately 10 times its diameter.
  • the compression sheath 4 consists of a fabric of flattened tubular braid type.
  • Cross elements 8, 9 intersecting obliquely to each other are used to achieve the braided. They are also constituted in this example by wicks in the sense of the invention. In the same way as previously these elements can be monofilaments or continuous threads of resistance equivalent to that interlacing wicks. They can also be spaced the same not p as above.
  • the sheath 4 based on transverse wires is a sheath tubular nonwoven.
  • the components of nonwoven fabrics can be fibers, filaments, continuous or discontinuous threads assembled in a manner known to form a nonwoven.
  • the elements are fibers 10 of a length preferred greater than 5 mm.
  • the transverse elements constituting the nonwoven may be spaced so that the nonwoven sheath has a coverage rate of bundle of filamentary wicks of the same order of magnitude as that resulting the spacing between elements 8 or 9, or 7 of Figures 3 and 2 or the spacing existing between the elements 11, 12 of FIGS. 5 and 6.
  • FIGS. 5 and 6 variants of the means are represented of compression.
  • At least one transverse element forms, in FIG. 5, a series of individual loops 11, while it forms a series of turns 12 to Figure 6.
  • the loops 11 or the turns 12 surround and tighten the layer of wicks 3 being distributed over the entire length of the bundle in a way equivalent to the compression sheath described above. They are made from a filamentary wick although a thread or a monofilament of the same strength as the wick may be suitable as alternative.
  • the value of the spacing between two loops or turns can correspond to the step p defined above.
  • the binding material is also placed at the interface of the loops 11 or turns 12 and filamentary strands 3.
  • the binding material is advantageously worn by loops 11 or turns 12 to form a cladding of the elements transverse, although it can be carried exclusively by the wicks longitudinal 3 by constituting a sheath prior to their assembly, or again both by the transverse elements 11 or 12 and the wicks longitudinal 3.
  • the restraint means 4 are designed to contain at least one bundle 2 in a compressed state.
  • State tablet can occur either during the manufacture of the tape 1 described below, either during its use when it is stressed in tension during or after winding around a curved surface.
  • the means of restraint composed for example of a sheath base of one or more transverse wires, oppose against lateral spreading of the locks, insofar as they contain the bundle within an initial predetermined scope.
  • the transverse wires of the sheath are then stressed in tension and produce a reaction around the beam which tends to compress the strands on themselves or at least in the direction of the width (transverse direction), compression in the thickness direction being mainly achieved, on the one hand by calendering and, on the other hand, during its use. There is therefore compression of the wicks 3 too both in the thickness direction of the ribbon 1 than in the width direction.
  • the material of the basic transverse element can be polyester type when the compression of the wicks 3 is not too high in the two cases described above.
  • Carbon threads are suitable for forming a compression sheath within the meaning of the invention. They are very resistant and they have also a very low elongation at break.
  • FIG. 7 illustrates a ribbon 1 comprising a bundle made up of two rows 13, 14 of filamentary wicks.
  • the tape 1 includes assembly means additional.
  • these means consist at least by tying material carried longitudinally by the wicks 3 of the beam.
  • the tying material is used also to increase the resistance of the ribbon to crushing, to the extent where it replaces the air trapped between the two rows 13, 14 of wicks.
  • the binding material contributes to reducing the amplitude of deformation of the ribbon 1 under stress in the direction of its thickness as well only across its width.
  • the binding material also helps stabilize the strands relative to each other (radial and / or lateral displacement) when the tape is under tensile stress while being supported around a surface curve.
  • the binding material is chosen from materials capable of binding the wicks directly or indirectly by physical and / or chemical adhesion and to follow their deformation, in particular in elongation. It was found that hardness materials up to around 60 shore D, suitable in a ribbon with aramid bundle wicks.
  • the binding material can be chosen from thermoplastics such as polyamides, polyolefins, vinyl, fluorinated, in particular thermoplastic copolymers and elastomeric thermoplastics, or among the elastomers such as natural or synthetic rubber, polyurethane, silicone.
  • thermoplastics such as polyamides, polyolefins, vinyl, fluorinated, in particular thermoplastic copolymers and elastomeric thermoplastics, or among the elastomers such as natural or synthetic rubber, polyurethane, silicone.
  • Thermosets such as PTFE, some polyurethanes, are also possible provided, however, that they are use in small proportion so as to maintain flexibility ribbon.
  • thermoplastic materials for their ease of implementation in the manufacture of the ribbon.
  • Figure 8 illustrates the case where the number of rows of the beam becomes more important, for example three rows 15 to 17, the means of contention being formed by turns 22. Provision may be made to complete the assembly means (sheath 4 and binding material 18) by elements of link 19, 22 to connect the upper 20 and lower 21 surfaces of the ribbon through the bundle of longitudinal strands.
  • connecting elements are filamentary rovings within the meaning of the invention although that continuous yarns or monofilaments of equivalent strength can also agree.
  • the connecting element 19, 22 progresses in the direction longitudinal passing alternately above and below the turns. In other words, the connecting elements overlap the transverse wires such that turns 12 in the manner of a seam. We thus obtain a structure 2.5D type textile.
  • the ribbon may include two connecting wires 19, 19a hooking alternatively the upper thread of a first loop, then the lower thread of a second consecutive loop and so on.
  • These connecting elements tend to bring surfaces together upper and lower ribbon during its manufacture. Subsequently, they mainly contribute to stabilize the ribbon in its thickness at against a possible resumption of volume in the direction perpendicular to surfaces 20 and 21.
  • the connecting elements pass through the ribbon like a needle thread 22a as illustrated in FIG. 9a which represents another embodiment.
  • the connecting wires 22a, or 19, 22 can carry the material of tying or another complementary tying material. They can be of the type core / sheath, the sheath being a thermoplastic coating. They can be also entirely made of thermoplastic, the whole wire being hot-melt. In general, the binding material can be carried by said thread. exclusive or non-exclusive connection.
  • binding material when carried by said connecting elements, it extends through said bundle of wicks filamentary in the thickness direction, this can be done either obliquely in the case of the seam illustrated in Figure 9 or 10, either vertically in the case of needling illustrated in FIG. 9a.
  • FIG. 11 one sees an embodiment in accordance with the figure 2.
  • This mode is advantageous insofar as it comprises a sheath mainly made up of longitudinal wires which contribute to the resistance when pulling the ribbon. It is easy to see that the 6 chain wires are flattened in the direction of thickness Y (vertical), while the wicks 3 of beam 2 are compressed on themselves in two directions X and Y, X being the direction of the width.
  • the binding material 18 is disposed only around the wicks 3 of the central bundle 2. According to this variant, the upper 20 and lower 21 surfaces of the ribbon are kept close together by means of the binding material, this being in contact with the two surfaces 20 and 21.
  • FIG. 13 illustrates an embodiment in which the material binding 18 is arranged around the chain son 6 of the compression sheath 4, and around the strands 3 of the bundle 2.
  • the properties of the ribbon thus designed with at least one coating of the wires 6 and wicks 3 are particularly efficient, both in terms of traction and the relative stability of wicks 3 between them, as shown by the test results presented infra.
  • the weft son 7 of the sheath of contention 4 are not coated.
  • FIG. 14 illustrates an embodiment where the binding material 18 is arranged only around the chain son 6 composing the sheath contention 4.
  • This tape has dimensional stability with respect to a volume recovery in thickness, after a compression operation and heating, as long as the upper and lower surfaces are connected together through a layer of wicks 3 of the bundle central 2.
  • the wires constituting the sheath contention 4, or the turns 12, 22, or the loops 11 or the said elements connecting 19, 19a can be uncoated with material. This has the advantage of delete at least one coating operation.
  • the compression sheath 4 In any application where the compression sheath 4 is subjected to dynamic contact with other tapes or other abrasive surfaces, it should have a surface coating of a low coefficient material of friction around the ribbon. Coating can be done before or after the ribbon is made. When he is carried out beforehand, for example for economic reasons, each wire 6, 7 or 8, 9, or 10 and 11, making up the compression sheath 4, is coated in the same way as the wicks 3 of the bundle 2. On the other hand, when it is performed later, this can be achieved by any process of known coating such as spraying, immersion, pultrusion, sheathing, stuffing.
  • the surface coating can advantageously impart a ribbon smoothed surface and a strictly rectangular section. That is particularly interesting for applications of the ribbon to articles of strapping or flat rope, etc.
  • the progression of the compression thread is carried out according to the modes of realization of the sheath below.
  • At least one element of contention 8 is crossed with at least one other 9, around wicks 3, according to the conventional braiding technique.
  • At least one weft thread 7 progresses around bundle 2 by making a weaving weave with longitudinal wires 6 parallel to the strands 3 of the bundle 2.
  • the weft 7 is woven with a pitch of the order of half a centimeter.
  • the sheath wire 10 performs loops as the longitudinal progression of the locks 3 of the bundle 2.
  • the sheath wire 11 is wound around the beam 2 during a longitudinal progression thereof.
  • a spiral is wound non-woven type tape around the wicks 3 of the bundle 2 in accordance with the tape technique.
  • the compression element is placed around the wicks, these being previously grouped so as to define a beam section of minimum perimeter for example substantially circular or square.
  • the ribbon After placing the sheath around bundle 2, whatever the embodiment, the ribbon is subjected to an operation during which it is compressed between the two surfaces 20, 21 while the material of tying 18 is activated. Preferably, the ribbon is also stretched longitudinally while it is compressed.
  • the bonding material 18 can be carried by the sheath wires and / or the filamentary strands of the harness, and / or the connecting elements 19, 19a, that is to say by any of the categories of element making up the ribbon.
  • the tying material is a thermoplastic
  • the activation is thermal in nature so as to bring the material to the molten state.
  • Such an operation can be traditionally performed by calendering, or hot drawing.
  • wicks sheathed with thermoplastic the sheathing or surface coating being obtained typically by extrusion.
  • the locks already have a good compactness by being sheathed, which goes in the direction of the result sought by the invention, on the other hand, it facilitates the operation of obtaining a weaving tight.
  • the sheathing reduces friction in the looms.
  • the content of binding in the ribbon by sheathing certain longitudinal strands of the bundle, for example one in two, or by covering part of the locks located by example at mid-distance of the ribbon taken in its width, so as to have at middle of the ribbon of tying material which extends across the bundle in the sense of thickness.
  • a structural tape according to the invention is shown at a enlarged scale in Figure 15. It includes 66 wires 6 and wicks 3 longitudinal (rovings) in aramid of 3,300 dtex each.
  • the beam comprises 49 wicks 3, while the sheath according to FIG. 2 comprises 17 chain son 6 distributed around the beam.
  • a weft thread (not visible), in aramid of equal title, binds the chain strands 6 with a loose pitch of 0.5 cm.
  • the ribbon also has four bonded wires 19 of 1,170 dtex spaced apart. evenly across the width of the ribbon. They are arranged to connect alternately the upper and lower passage of the frame around the beam.
  • All wires have been coated with a surface coating copolyamide prior to the manufacture of the ribbon. Before calendering on bundle includes two rows of 24 and 25 wires superimposed one on the other.
  • the ribbon then consists of a certain agglomeration of threads, of binding material and air and has the appearance of a sectional mosaic transverse.
  • the wires are compressed and agglutinated in the direction of thickness, while others are more compressed in the direction of the width of the ribbon.
  • the binding material is located at the interface of the wires and periphery of the wires in a declining gradient in the direction of the center of the son.
  • the air is located in the central area of the wires.
  • the average compactness thus obtained was 640 tex / mm 2 but an average compactness greater than 550 tex / mm 2 could be suitable. It is much higher than the compactness of a traditional textile tape which is generally at best between 400 and 500 tex / mm 2 .
  • Ribbon cross section image analysis performed using "PHOTOSHOP” image processing hardware and software and "OPTILAB” made it possible to determine the proportions of the constituents of the ribbon.
  • the average rate of binding material between the strands represents 31% (100% - 69%) of the area of the ribbon section, the air being only contained in the locks and the binding material being mainly located between the locks and a little in the locks by impregnation of the filaments located at the periphery.
  • the proportion of one of the constituents of the ribbon by compared to others may vary depending on the penetration rate of the binding material in filamentary rovings.
  • each alveolus 6a or 3a extending longitudinally in the ribbon.
  • the wall 3b or 6b of each cell corresponds to the periphery of each wick 3 or 6.
  • the nature of the wall 6b is assimilated to a composite made up of the binding material and fibers in respective proportions of around 35% and 65%.
  • the cells 6a are connected together by binding material 18 without fibers or by a portion of their respective wall.
  • the thickness of this wall 6b is variable; it corresponds to the penetration depth of the binding material in each wick. The penetration depth is such that the surface of the wall section represents approximately 5 to 30% of the surface of each wick, and on average around 10%.
  • each wick is in contact at least one other wick so as to have a portion of wall common. On average each wick is in contact with at least two other wicks.
  • the binding material is not only arranged at the interface said means of restraint, in this case a sheath and the wicks longitudinal filamentary of the bundle but it still extends across said beam by the path of the cells. This journey takes place in the thickness direction and in the width direction of the tape. Of this so we get excellent stability of the wicks whatever the ribbon usage conditions.
  • each wick also has a portion of wall connected to at least one wall of another wick by means of fiber-free binding material.
  • the ribbons having a reduced thickness of the made of compactness obtained. This results in good performance exhibited above in terms of maximum admissible stress when the ribbon is stressed in linear traction.
  • Ribbon performance is even more remarkable compared to those of the ribbons of the prior art, when it is in support on a curved surface.
  • the longitudinal bits do not cannot be used together at their maximum resistance because they are not even.
  • the ribbon according to the invention is little affected by this. insofar as it is designed to have an optimal compactness. From this fact, it is particularly suitable for obtaining a high resistance in absolute value.
  • the invention allows not only to reduce the lapse but also the lack of equi-tension, each one being responsible for a drop in yield directly linked increasing the number of strands in the ribbon.
  • a flexible pipe is called “bonded” when it comprises several individually wrapped and extruded layers, then bonded together using adhesive or unified under the effect of temperature and / or pressure, and it is said to be “non-bonded” when it is made up of several layers individual and separate without adhesion between them, each layer being rolled or extruded over the layers which are located below by a continuous process over the entire length of the pipe.
  • This conduct may also include an internal carcass which may or may not be related to the adjacent layer with adhesive material.
  • FIG. 17A schematically represents a flexible pipe 26a called “smooth bore” and of the "non-bonded” type, comprising an internal tube 41 of polymeric material, two plies of tack 28 and 29 and a sheath protective exterior 30.
  • Each armor ply 28, 29 is formed by a plurality of ribbons according to the invention and described above.
  • the ribbons are replaced by a braid.
  • the reinforcement tape according to the invention can also to be used only as a reinforcement element resistant to circumferential stresses induced by internal pressure (arch of pressure not shown).
  • it is wound with a weak pitch, of identical to the arch 40 of FIG. 17, for example with an angle 85 ° reinforcement with respect to the longitudinal axis of a pipe.
  • such a ribbon has a excessive stiffness and excessively resists or breaks upon bending. It is therefore recommended to limit the penetration of the binding material into the wick and to keep air in the wick in a proportion equal to at least Around 5% and preferably 15% to 30%. The flexibility thus obtained is satisfactory even in the case where several layers of longitudinal strands are superimposed in the thickness of the ribbon.
  • the ribbon has the advantage of being able to be used on pipes which have a low resistance to crushing (collapse), by example of flexible pipes free of carcass.
  • the thickness of a tubular layer can be reduced internal. This is particularly the case of a polymer tube on which is produced the armament.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulding By Coating Moulds (AREA)
  • Insulated Conductors (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Duct Arrangements (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Woven Fabrics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (13)

  1. Flachband
    mit wenigstens einer Schicht (2) aus longitudinalen Filament-Lunten (3), die in Form eines relativ flachen Bündels mit einem im wesentlichen rechteckigen Querschnitt miteinander verpreßt sind,
    mit Haltemitteln (4), die die Schicht aus Filament-Lunten umschließen und zusammendrücken,
    mit einem Bindematerial (18), das zumindest an der Grenzfläche zwischen den Haltemitten (4) den longitudinalen Filament-Lunten (3) angeordnet ist,

    dadurch gekennzeichnet,
    daß die Haltemittel Verbindungselemente (19, 19a, 22, 22a) umfassen, die die Oberseite und die Unterseite des Bandes über die ganze Länge des Bandes durch das Bündel aus longitudinalen Lunten hindurch verbinden,
    daß jede der longitudinalen Filament-Lunten (3) eine mittlere Packungsdichte von wenigstens 60% hat
    und daß das Flachband nach dem Komprimieren einen Verlust von weniger als 25% hat.
  2. Flachband nach Anspruch 1, dadurch gekennzeichnet, daß der Haltemantel (4) gewebt ist und seine Kettelemente im wesentlichen parallel zu den longitudinalen Filament-Lunten und seine Schußelemente im wesentlichen senkrecht zu den Kettelementen verlaufen.
  3. Flachband nach Anspruch 1, dadurch gekennzeichnet, daß die longitudinalen Filament-Lunten mit Bindematerial umhüllt sind, das in dem Band ein Volumenverhältnis von mehr als 40% besitzt.
  4. Flachband nach Anspruch 1, dadurch gekennzeichnet, daß jedes Verbindungselement eine Längsnaht (19, 19a, 22) bildet.
  5. Flachband nach Anspruch 1, dadurch gekennzeichnet, daß jedes Verbindungselement das Band nach Art eines Nähfadens (22a) vertikal durchdringt.
  6. Flachband nach Anspruch 1, dadurch gekennzeichnet, daß jedes Verbindungselement mit einem Bindematerial überzogen ist.
  7. Flachband nach Anspruch 1, dadurch gekennzeichnet, daß jedes Verbindungselement aus einem thermoplastischen Bindematerial besteht.
  8. Verfahren zur Herstellung des Bandes nach Anspruch 1,
       dadurch gekennzeichnet,
    daß man die Oberfläche wenigstens eines Teils der Filament-Lunten mit einem Bindematerial beschichtet,
    daß man die longitudinalen Filament-Lunten des Bündels unter einer kontrollierten Belastung gespannt hält, während man wenigstens einen Haltemantel um die Lunten anordnet,
    und daß man das so zusammengestellte Bündel komprimiert, während das Bindematerial aktiviert wird.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß das Bindematerial ein Thermoplast ist und daß das Komprimieren des zusammengestellten Bündels durch Warmkalandrieren oder in einem Warmziehvorgang durchgeführt wird.
  10. Flexible Rohrleitung mit einer Armierung, dadurch gekennzeichnet, daß die Armierung von wenigstens einem Band nach einem der Ansprüche 1 bis 7 gebildet wird.
  11. Flexible Rohrleitung nach Anspruch 10, dadurch gekennzeichnet, daß die Armierung wenigstens zwei übereinanderliegende Lagen aufweist, die jeweils aus mehreren in entgegengesetzten Richtungen spiralig angeordneten Bändern bestehen.
  12. Flexible Rohrleitung nach Anspruch 11, dadurch gekennzeichnet, daß die Lagen der Armierung unter einem Winkel von 55° einander kreuzen.
  13. Flexible Rohrleitung nach Anspruch 10, dadurch gekennzeichnet, daß die Armierung aus geflochtenen Bändern besteht.
EP96931871A 1995-10-04 1996-09-18 FLACHBAND IM BESONDEREN ZUM VERSTäRKEN VON LEITUNGEN, VERFAHREN ZU DESSEN HERSTELLUNG UND LEITUNGEN DIE DURCH DAS FLACHBAND VERSTäRKT WERDEN Expired - Lifetime EP0853547B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9511676A FR2739674B1 (fr) 1995-10-04 1995-10-04 Ruban plat notamment pour renforcer des conduites, son procede de fabrication, et conduites renforcees par de tels rubans
FR9511676 1995-10-04
PCT/FR1996/001453 WO1997012753A1 (fr) 1995-10-04 1996-09-18 Ruban plat notamment pour renforcer des conduites, son procede de fabrication, et conduites renforcees par de tels rubans

Publications (2)

Publication Number Publication Date
EP0853547A1 EP0853547A1 (de) 1998-07-22
EP0853547B1 true EP0853547B1 (de) 1999-12-08

Family

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Application Number Title Priority Date Filing Date
EP96931871A Expired - Lifetime EP0853547B1 (de) 1995-10-04 1996-09-18 FLACHBAND IM BESONDEREN ZUM VERSTäRKEN VON LEITUNGEN, VERFAHREN ZU DESSEN HERSTELLUNG UND LEITUNGEN DIE DURCH DAS FLACHBAND VERSTäRKT WERDEN

Country Status (9)

Country Link
US (1) US6165586A (de)
EP (1) EP0853547B1 (de)
AT (1) ATE187383T1 (de)
AU (1) AU726081B2 (de)
CA (1) CA2233968A1 (de)
DE (1) DE69605562D1 (de)
FR (1) FR2739674B1 (de)
PL (1) PL185825B1 (de)
WO (1) WO1997012753A1 (de)

Cited By (1)

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EP1766278A1 (de) 2004-07-08 2007-03-28 NKT Flexibles I/S Flexibles rohr, seine herstellung und verwendung

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FR2828722B1 (fr) * 2001-08-14 2003-10-31 Coflexip Ruban textile plat de renfort pour conduite et conduite ainsi renforcee
BR0203095A (pt) * 2002-03-19 2004-06-01 Marcia Luiza Freitas Ganem Processo para a produção de trama de fibra de poliamida
FR2850117B1 (fr) * 2003-01-21 2005-07-29 Chomarat Composites Ruban de renforcement
FR2857690B1 (fr) * 2003-07-15 2005-08-26 Inst Francais Du Petrole Systeme de forage en mer comprenant une colonne montante haute pression
WO2005043020A1 (en) * 2003-10-31 2005-05-12 Nkt Flexibles I/S A flexible pipe with a permeable outer sheath and a method of its manufacturing
US20070209729A1 (en) * 2006-03-09 2007-09-13 Arrowhead Products Corporation Cable reinforcement for flexible ducts
US20080085388A1 (en) 2006-09-26 2008-04-10 Intertape Polymer Corp. Filament reinforced tapes useful as underwater pipe wrap
EP2137445B2 (de) 2007-03-21 2020-03-25 Technip France Biegsame leitung zur föderung von kohlenwasserstoffen mit verstärkter erhaltungsschicht
FR2914040B1 (fr) * 2007-03-21 2009-05-01 Technip France Sa Conduite flexible pour le transport des hydrocarbures a couche de maintien renforcee
FR2926347B1 (fr) * 2008-01-11 2009-12-18 Technip France Conduite flexible pour le transport des hydrocarbures en eau profonde
EP2707634A4 (de) 2011-05-10 2015-02-25 Nat Oilwell Varco Denmark Is Unverbundener schlauch
WO2013128006A2 (en) * 2012-03-01 2013-09-06 Dsm Ip Assets B.V. Method and device for impregnating a rope with a liquid material
EP2825802A4 (de) * 2012-03-13 2015-12-02 Nat Oilwell Varco Denmark Is Versteifungselement für eine nicht verbundenes flexibles rohr
BR112014025219A2 (pt) 2012-04-12 2017-07-11 Nat Oilwell Varco Denmark Is método para produzir um tubo flexível não unido, e, tubo flexível não unido
AU2013271027B2 (en) 2012-06-06 2017-04-06 National Oilwell Varco Denmark I/S A riser and an offshore system
FR2996280B1 (fr) 2012-09-28 2014-09-26 Technip France Conduite tubulaire flexible instrumentee
GB201306667D0 (en) 2013-04-12 2013-05-29 Wellstream Int Ltd A flexible pipe body and method of manufacture
WO2015139708A1 (en) 2014-03-21 2015-09-24 National Oilwell Varco Denmark I/S A flexible pipe
FR3022320B1 (fr) 2014-06-16 2016-07-29 Technip France Conduite tubulaire a bande de maintien composite
BR112019018773B1 (pt) 2017-03-16 2024-03-05 Baker Hughes Energy Technology UK Limited Corpo de tubo flexível para transporte de fluidos de produção, tubo flexível para transportar fluidos de produção e método para fornecer continuidade elétrica entre fios de blindagem de tensão em uma camada de blindagem de tensão
WO2018193611A1 (ja) * 2017-04-21 2018-10-25 日産自動車株式会社 繊維強化樹脂製部品の接続構造および繊維強化樹脂製部品の製造方法
JP7098662B2 (ja) * 2017-06-07 2022-07-11 ダウ グローバル テクノロジーズ エルエルシー ランダムに配向したフィラメントを有する成形化合物、ならびにその作製および使用方法
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Also Published As

Publication number Publication date
AU7088696A (en) 1997-04-28
PL185825B1 (pl) 2003-08-29
AU726081B2 (en) 2000-11-02
WO1997012753A1 (fr) 1997-04-10
PL328165A1 (en) 1999-01-18
US6165586A (en) 2000-12-26
ATE187383T1 (de) 1999-12-15
FR2739674A1 (fr) 1997-04-11
EP0853547A1 (de) 1998-07-22
DE69605562D1 (de) 2000-01-13
FR2739674B1 (fr) 1997-12-05
CA2233968A1 (en) 1997-04-10

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